Skip to main content
Livermore
Livermore
ZHEN

Octave Specialty Group Inc

OSG
Exchange
NYSE
Industry
Surety Insurance
SEC CIK
0000874501

No open-market purchases or sales by Octave Specialty Group Inc insiders were filed in the last 90 days; 147 institutions reported holding it in 13F filings for Q2 2026, worth $187.6M in total; no superinvestor holds it.

13F holders, Q1 2025

Institutional positions in Octave Specialty Group Inc as of Mar 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
176
−2 vs. Q4 2024
Shares held
37.5M
−3.07M (−7.6%) vs. Q4 2024
Total value
$327.5M
−$183.8M (−35.9%) vs. Q4 2024
New holders
35
53 more added
Sold out
37
59 more reduced

3 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2024: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting OSG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2025: 176 institutions
Q1 2021: 140 institutionsQ2 2021: 126 institutionsQ3 2021: 133 institutionsQ4 2021: 135 institutionsQ1 2022: 150 institutionsQ2 2022: 141 institutionsQ3 2022: 154 institutionsQ4 2022: 167 institutionsQ1 2023: 160 institutionsQ2 2023: 160 institutionsQ3 2023: 167 institutionsQ4 2023: 174 institutionsQ1 2024: 172 institutionsQ2 2024: 182 institutionsQ3 2024: 180 institutionsQ4 2024: 181 institutionsQ1 2025: 176 institutionsQ2 2025: 147 institutionsQ3 2025: 130 institutionsQ4 2025: 144 institutionsQ1 2026: 148 institutionsQ2 2026: 147 institutions
Value heldQ1 2025: $327.5M
Q1 2021: $611.7MQ2 2021: $565.0MQ3 2021: $516.2MQ4 2021: $598.9MQ1 2022: $392.1MQ2 2022: $386.6MQ3 2022: $400.7MQ4 2022: $600.4MQ1 2023: $596.2MQ2 2023: $529.6MQ3 2023: $438.7MQ4 2023: $628.4MQ1 2024: $591.5MQ2 2024: $495.9MQ3 2024: $449.6MQ4 2024: $522.4MQ1 2025: $327.5MQ2 2025: $262.5MQ3 2025: $303.6MQ4 2025: $270.0MQ1 2026: $151.4MQ2 2026: $187.6M
Institutions holding OSG and their total value by quarter
QuarterHoldersValue
Q2 2026147$187.6M
Q1 2026148$151.4M
Q4 2025144$270.0M
Q3 2025130$303.6M
Q2 2025147$262.5M
Q1 2025176$327.5M
Q4 2024181$522.4M
Q3 2024180$449.6M
Q2 2024182$495.9M
Q1 2024172$591.5M
Q4 2023174$628.4M
Q3 2023167$438.7M
Q2 2023160$529.6M
Q1 2023160$596.2M
Q4 2022167$600.4M
Q3 2022154$400.7M
Q2 2022141$386.6M
Q1 2022150$392.1M
Q4 2021135$598.9M
Q3 2021133$516.2M
Q2 2021126$565.0M
Q1 2021140$611.7M

Institutions, Q1 2025

Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc; share changes are against Q4 2024.

Institutions holding OSG in Q1 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Bessemer Group Inc29$00.00%−413−93.4%Reduced
CWM, LLC6$00.00%−327−98.2%Reduced
Covestor Ltd21$00.00%−91−81.3%Reduced
Hantz Financial Services, Inc.12$00.00%+12New
SBI Securities Co., Ltd.10$880.00%00.0%Unchanged
IFP Advisors, Inc0$1050.00%0Unchanged
Caitong International Asset Management Co., Ltd13$1140.00%+13New
True Wealth Design, LLC13$1140.00%+13New
Versant Capital Management, Inc19$1660.00%00.0%Unchanged
Principal Securities, Inc.16$2020.00%00.0%Unchanged
Legacy Wealth Managment, LLC25$2190.00%00.0%Unchanged
Allworth Financial LP29$2250.00%+10+52.6%Added
Farmers & Merchants Investments Inc31$2710.00%00.0%Unchanged
Stephens Consulting, LLC40$3500.00%+40New
Quadrant Capital Group LLC46$4030.00%−101−68.7%Reduced
Parkside Financial Bank & Trust55$4820.00%+55New
Advisor Group Holdings, Inc.58$5070.00%−535−90.2%Reduced
Massmutual Trust Co FSB81$7090.00%−71−46.7%Reduced
Smartleaf Asset Management LLC96$8300.00%−371−79.4%Reduced
Russell Investments Group, Ltd.127$1.11K0.00%−170,409−99.9%Reduced
Rothschild Investment LLC147$1.29K0.00%+5+3.5%Added
Huntington National Bank158$1.38K0.00%00.0%Unchanged
Assetmark, Inc158$1.38K0.00%00.0%Unchanged
DiNuzzo Private Wealth, Inc.177$1.55K0.00%00.0%Unchanged
Red Tortoise LLC180$1.57K0.00%00.0%Unchanged
Pinnacle Holdings, LLC186$1.63K0.00%00.0%Unchanged
Farther Finance Advisors, LLC256$2.11K0.00%+167+187.6%Added
Boston Private Wealth LLC281$2.46K0.00%+281New
Capital Analysts, LLC325$3.00K0.00%00.0%Unchanged
Barrow Hanley Mewhinney & Strauss LLC450$3.94K0.00%00.0%Unchanged
Wiser Advisor Group LLC500$4.38K0.01%00.0%Unchanged
GAMMA Investing LLC510$4.46K0.00%−1,019−66.6%Reduced
Lindbrook Capital, LLC549$4.80K0.00%−84−13.3%Reduced
Fifth Third Bancorp622$5.44K0.00%+193+45.0%Added
Sterling Capital Management LLC785$6.87K0.00%−605−43.5%Reduced
Skopos Labs, Inc.960$8.40K0.00%+608+172.7%Added
Nisa Investment Advisors, LLC970$8.49K0.00%−31−3.1%Reduced
Harbor Capital Advisors, Inc.1,377$12.0K0.00%+386+39.0%Added
US Bancorp1,372$12.0K0.00%+681+98.6%Added
Amalgamated Bank1,567$14.0K0.00%−12,373−88.8%Reduced
Teachers Retirement System of the State of Kentucky1,601$14.0K0.00%−10,700−87.0%Reduced
Royal Bank of Canada3,012$27.0K0.00%−2,975−49.7%Reduced
Tower Research Capital LLC (TRC)3,348$29.3K0.00%+666+24.8%Added
Ameritas Investment Partners, Inc.4,583$40.1K0.00%00.0%Unchanged
Quest Partners LLC6,947$60.8K0.01%+6,947New
Police & Firemen's Retirement System of New Jersey9,202$80.5K0.00%00.0%Unchanged
Zurcher Kantonalbank (Zurich Cantonalbank)9,826$86.0K0.00%00.0%Unchanged
New York State Common Retirement Fund10,073$88.1K0.00%00.0%Unchanged
CIBC World Markets Corp10,101$88.4K0.00%+10,101New
DRW Securities, LLC10,800$94.5K0.01%+10,800New
State of Tennessee, Treasury Department11,095$97.1K0.00%00.0%Unchanged
Inceptionr LLC11,189$97.9K0.03%+11,189New
Franklin Resources Inc11,464$100.3K0.00%−1,013−8.1%Reduced
Man Group plc12,198$106.7K0.00%+12,198New
KLP Kapitalforvaltning AS12,400$108.5K0.00%00.0%Unchanged
Envestnet Portfolio Solutions, Inc.12,527$109.6K0.00%+12,527New
State Board of Administration of Florida Retirement System12,630$110.5K0.00%00.0%Unchanged
Voya Investment Management LLC12,696$111.1K0.00%−1,419−10.1%Reduced
Catalyst Funds Management Pty Ltd12,840$112.3K0.03%+12,840New
SummitTX Capital, L.P.13,069$114.4K0.01%+13,069New
Arizona State Retirement System13,609$119.1K0.00%−159−1.2%Reduced
First Citizens Bank & Trust Co14,070$123.1K0.00%+14,070New
State of Wyoming14,758$129.1K0.02%+12,166+469.4%Added
Hudson Bay Capital Management LP15,470$135.4K0.00%+15,470New
Laurion Capital Management LP16,353$143.1K0.01%+16,353New
Manufacturers Life Insurance Company, The16,378$143.3K0.00%+27+0.2%Added
SEI Investments Co18,876$165.2K0.00%−9,118−32.6%Reduced
Mraz, Amerine & Associates, Inc.19,550$169.1K0.03%+4,650+31.2%Added
Petrus Trust Company, LTA19,432$170.0K0.02%+19,432New
Janus Henderson Group PLC19,792$171.1K0.00%00.0%Unchanged
EntryPoint Capital, LLC20,235$177.1K0.08%+20,235New
Point72 (DIFC) Ltd20,799$182.0K0.02%+15,106+265.3%Added
BNP Paribas Arbitrage, SA21,066$184.3K0.00%−39,902−65.4%Reduced
Gator Capital Management, LLC21,435$187.6K0.07%00.0%Unchanged
Cresset Asset Management, LLC22,193$194.2K0.00%−370−1.6%Reduced
Corebridge Financial, Inc.22,301$195.1K0.00%−2,003−8.2%Reduced
Quantessence Capital LLC23,500$205.6K0.05%+23,500New
MetLife Investment Management23,542$206.0K0.00%−3,296−12.3%Reduced
KLCM Advisors, Inc.24,000$210.0K0.02%+10,000+71.4%Added
Ensign Peak Advisors, Inc24,133$211.2K0.00%00.0%Unchanged
Freestone Grove Partners LP25,759$225.4K0.00%+12,265+90.9%Added
Mirae Asset Global ETFs Holdings Ltd.26,977$236.0K0.00%+1,170+4.5%Added
Magnetar Financial LLC27,188$237.9K0.00%+27,188New
Axq Capital, LP27,745$242.8K0.10%+15,633+129.1%Added
Alliancebernstein L.P.27,840$243.6K0.00%−13,400−32.5%Reduced
Connor, Clark & Lunn Investment Management Ltd.31,199$273.0K0.00%−16,107−34.0%Reduced
Two Sigma Advisers, LP32,300$282.6K0.00%+11,200+53.1%Added
Point72 Asset Management, L.P.33,100$289.6K0.00%+25,800+353.4%Added
Great West Life Assurance Co34,226$300.0K0.00%−43,429−55.9%Reduced
SG Americas Securities, LLC36,196$317.0K0.00%+36,196New
Jain Global LLC36,672$320.9K0.01%+36,672New
Intech Investment Management LLC37,138$325.0K0.00%−6,491−14.9%Reduced
Verition Fund Management LLC39,381$344.6K0.00%−34,954−47.0%Reduced
HAP Trading, LLC41,939$367.0K0.13%+41,939New
Oxford Asset Management LLP42,123$368.6K0.17%+23,806+130.0%Added
Legal & General Group Plc43,542$381.0K0.00%−79,397−64.6%Reduced
California State Teachers Retirement System44,277$387.4K0.00%00.0%Unchanged
Point72 Asia (Singapore) Pte. Ltd.45,090$394.5K0.10%+44,961+34,853.5%Added
Fox Run Management, L.L.C.45,171$395.2K0.06%+18,354+68.4%Added
Citigroup Inc48,416$423.6K0.00%−22,202−31.4%Reduced